TWI407055B - Illumination device - Google Patents
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- TWI407055B TWI407055B TW97139970A TW97139970A TWI407055B TW I407055 B TWI407055 B TW I407055B TW 97139970 A TW97139970 A TW 97139970A TW 97139970 A TW97139970 A TW 97139970A TW I407055 B TWI407055 B TW I407055B
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Abstract
Description
本發明涉及一種照明裝置，尤其涉及一種可削弱重影現象之LED照明裝置。 The present invention relates to a lighting device, and more particularly to an LED lighting device capable of attenuating ghosting phenomena.
LED(Light Emitting Diode)具有環保、節能、壽命長等優點而被視為21世紀照明光源，具有替代傳統照明光源之極大潛力。隨著LED技術之成熟，利用LED作為光源之照明裝置陸續上市。目前，LED照明裝置已應用於市政照明、住宅照明、通訊設備、醫療設備、工業設備等諸多領域。 LED (Light Emitting Diode) is considered to be an illumination source in the 21st century because of its environmental protection, energy saving and long life. It has great potential to replace traditional lighting sources. With the maturity of LED technology, lighting devices using LEDs as light sources have been listed. At present, LED lighting devices have been used in many fields such as municipal lighting, residential lighting, communication equipment, medical equipment, industrial equipment, and the like.
然，因LED體積較小，將其應用於照明裝置時通常需要設置複數顆LED並進行模組化，以形成具有足夠光通量之發光單元。而LED光源為點光源，其發出之光線向四週散射，處於不同位置之複數LED光源同時照射一物體時，將於投影面上形成複數影子，該複數影子相互重疊造成重影現象，使得被照射物體於投影面上形成一面積較大之陰影區域，降低了照明之品質，從而限制了LED在需要較佳之照明效果，比如精密作業環境照明中之應用。 However, since the LED is small in volume, it is usually required to provide a plurality of LEDs and modularize them when applied to a lighting device to form a light-emitting unit having sufficient luminous flux. The LED light source is a point light source, and the emitted light is scattered around. When a plurality of LED light sources at different positions simultaneously illuminate an object, a complex shadow is formed on the projection surface, and the complex shadows overlap each other to cause a ghost phenomenon, so that the light is irradiated. The object forms a large shaded area on the projection surface, which reduces the quality of the illumination, thereby limiting the application of the LED in requiring better illumination effects, such as precision work environment illumination.
鑒於上述狀況，有必要提供一種能削弱重影、提高照明品質之照明裝置。 In view of the above situation, it is necessary to provide a lighting device capable of reducing ghosting and improving lighting quality.
一種照明裝置，其包括一殼體和複數發光二極體。該殼體包括一基板以及複數由該基板側邊向同一側面延伸之側壁，該複數發光二極體設置於該基板表面。照明裝置還包括依次設置於發光二極體上方之第一光學板和第二光學板，該第一、第二光學板均包括一入光面及與該入光面相對之出光面。第一光學板之入光面靠近複數發光二極體。第一光學板還包括形成於該第一光學板出光面之相互平行之複數長條狀弧形凸起，第二光學板還包括形成於該第二光學板出光面之沿至少兩個不同方向延伸之複數V形脊結構，該沿不同方向延伸之複數V形脊結構相互交錯。 A lighting device includes a housing and a plurality of light emitting diodes. The housing includes a substrate and a plurality of sidewalls extending from the side of the substrate to the same side, and the plurality of LEDs are disposed on the surface of the substrate. The illuminating device further includes a first optical plate and a second optical plate which are sequentially disposed above the light emitting diode. The first and second optical plates each include a light incident surface and a light emitting surface opposite to the light incident surface. The light incident surface of the first optical plate is adjacent to the plurality of light emitting diodes. The first optical plate further includes a plurality of elongated arc-shaped protrusions formed on the light-emitting surface of the first optical plate, and the second optical plate further includes at least two different directions formed along the light-emitting surface of the second optical plate. Extending the plurality of V-shaped ridge structures, the plurality of V-shaped ridge structures extending in different directions are interlaced.
上述照明裝置，藉由於發光二極體上方設置第一光學板，發光二極體出射之光線經形成於第一光學板出光面之長條狀弧形凸起之作用後，向四週擴展形成均勻出射之線性光源，藉由於第一光學板上方設置第二光學板，從第一光學板出光面出射之光線經成形於第二光學板出光面之V形脊結構之作用後，對光線進行進一步均勻化，並進行集光以改善發光二極體上方之亮度，使得從第二光學板出射之光線形成均勻之面光源，從而削弱照明裝置使用時產生之重影，提高其照明品質。 In the above illumination device, since the first optical plate is disposed above the light-emitting diode, the light emitted from the light-emitting diode expands to form a uniform shape after being formed by the long arc-shaped protrusion formed on the light-emitting surface of the first optical plate. The linear light source is emitted, and the light emitted from the light exit surface of the first optical plate is further formed by the V-shaped ridge structure formed on the light exit surface of the second optical plate by the second optical plate disposed above the first optical plate. Homogenizing and collecting light to improve the brightness above the light-emitting diode, so that the light emitted from the second optical plate forms a uniform surface light source, thereby weakening the ghost generated when the lighting device is used, and improving the illumination quality.
200‧‧‧照明裝置 200‧‧‧Lighting device
21‧‧‧殼體 21‧‧‧ housing
211‧‧‧基板 211‧‧‧Substrate
212‧‧‧側壁 212‧‧‧ side wall
22‧‧‧發光二極體 22‧‧‧Lighting diode
23‧‧‧第一擴散空間 23‧‧‧First diffusion space
24、34‧‧‧第一光學板 24, 34‧‧‧ first optical board
241、261、341、461‧‧‧入光面 2411, 261, 341, 461‧‧‧ into the glossy surface
242、262、342、462‧‧‧出光面 242, 262, 342, 462‧‧ ‧ light surface
244‧‧‧長條狀弧形凹槽 244‧‧‧Large curved grooves
246、348‧‧‧長條狀弧形凸起 246, 348‧‧‧ long strip-shaped convex bulges
25‧‧‧第二擴散空間 25‧‧‧Second diffusion space
26、46‧‧‧第二光學板 26, 46‧‧‧ second optical plate
264a、264b、264c、264d、464a、464b、464c‧‧‧V形脊結構 264a, 264b, 264c, 264d, 464a, 464b, 464c‧‧‧ V-shaped ridge structure
264‧‧‧三棱錐凹槽 264‧‧‧ triangular pyramid groove
266‧‧‧四角星形 266‧‧‧ four-pointed star
27‧‧‧透明保護板 27‧‧‧Transparent protection board
346‧‧‧長條狀V型凸起 346‧‧‧Long strip V-shaped bulge
465‧‧‧三棱錐形凹槽 465‧‧‧ triangular pyramid groove
466‧‧‧四棱錐形凹槽 466‧‧‧ quadrangular pyramid groove
圖1係本發明實施例一之照明裝置之剖面示意圖。 1 is a schematic cross-sectional view of a lighting device in accordance with a first embodiment of the present invention.
圖2係圖1所示照明裝置之第一光學板之立體圖。 Figure 2 is a perspective view of the first optical plate of the illumination device of Figure 1.
圖3係圖1所示照明裝置之第二光學板之立體圖。 Figure 3 is a perspective view of the second optical plate of the illumination device of Figure 1.
圖4係本發明實施例二之照明裝置之第一光學板之立體圖。 4 is a perspective view of a first optical plate of a lighting device according to Embodiment 2 of the present invention.
圖5係圖4所示之第一光學板沿V-V方向之剖面示意圖。 Figure 5 is a cross-sectional view of the first optical plate shown in Figure 4 taken along the line V-V.
圖6係本發明實施例三之照明裝置之第二光學板之立體圖。 Figure 6 is a perspective view of a second optical plate of the illumination device of the third embodiment of the present invention.
下面將結合附圖及具體實施例對本發明之照明裝置作進一步之詳細說明。 The lighting device of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
請參見圖1，本發明實施例一之照明裝置200包括一具有一開口端之殼體21、複數發光二極體22、一第一光學板24、一第二光學板26以及一透明保護板27。殼體21包括一基板211以及由基板211側邊向同一側面垂直延伸之側壁212，該複數發光二極體22設置於基板211表面。第二光學板26及透明保護板27沿光線出射之方向依次設置於殼體21之開口端，第一光學板24間隔設置於發光二極體22與第二光學板26間。第一光學板24與發光二極體22及第二光學板26間均間隔一定距離，從而將殼體21之內部空間分割形成第一擴散空間23以及第二擴散空間25。 Referring to FIG. 1, a lighting device 200 according to a first embodiment of the present invention includes a housing 21 having an open end, a plurality of LEDs 22, a first optical panel 24, a second optical panel 26, and a transparent protection panel. 27. The housing 21 includes a substrate 211 and side walls 212 extending perpendicularly from the sides of the substrate 211 to the same side. The plurality of LEDs 22 are disposed on the surface of the substrate 211. The second optical plate 26 and the transparent protective plate 27 are sequentially disposed at the open end of the casing 21 in the direction in which the light is emitted, and the first optical plate 24 is spaced apart between the light-emitting diode 22 and the second optical plate 26. The first optical plate 24 is spaced apart from the light-emitting diode 22 and the second optical plate 26 by a predetermined distance, thereby dividing the internal space of the casing 21 into the first diffusion space 23 and the second diffusion space 25.
殼體21可由表面具有高反射率之金屬或塑膠製成，也可於其內壁塗佈具有高反射率之塗層，以使光線於殼體21內能夠完全反射。殼體21內側壁還具有支撐結構用於支撐第一光學板24。 The casing 21 may be made of metal or plastic having a high reflectivity on the surface, or a coating having a high reflectivity may be applied to the inner wall thereof so that the light can be completely reflected in the casing 21. The inner side wall of the housing 21 also has a support structure for supporting the first optical plate 24.
請參見圖2，第一光學板24由透明材料製成，其包括入光面241及與入光面241相對之出光面242。入光面241上形成有複數長條狀弧形凹槽244，出光面242具有複數長條狀弧形凸起246。長條狀弧形凹槽244之延伸方向與長條狀弧形凸起246之延伸方向相互平行。 Referring to FIG. 2 , the first optical plate 24 is made of a transparent material, and includes a light incident surface 241 and a light exit surface 242 opposite to the light incident surface 241 . A plurality of elongated arcuate grooves 244 are formed on the light incident surface 241, and the light exiting surface 242 has a plurality of elongated arcuate protrusions 246. The extending direction of the elongated arcuate groove 244 is parallel to the extending direction of the elongated arcuate projection 246.
上述形成於入光面241之複數長條狀弧形凹槽244相互平行。每一長條狀弧形凹槽244之垂直方向之截面形狀為半圓形。將長條狀弧形凹槽244之圓弧半徑記為R1，相鄰兩長條狀弧形凹槽244之中心間距記為P1，每一長條狀弧形凹槽244之最大深度記為H1，則R1、P1及H1滿足以下關係式：0.025mm≦P1≦1.5mm，P1/4≦R1≦2P1，0.01mm≦H1≦R1。本實施例中相鄰兩長條狀弧形凹槽244間之中心間距P1為0.275mm，每一長條狀弧形凹槽244之半徑R1為0.1375mm，每一長條狀弧形凹槽244之最大深度H1為0.11mm。 The plurality of elongated arcuate grooves 244 formed on the light incident surface 241 are parallel to each other. The cross-sectional shape of each of the elongated arcuate grooves 244 in the vertical direction is semicircular. The radius of the arc of the long arc-shaped groove 244 is denoted as R 1 , and the center-to-center spacing of the adjacent two elongated arcuate grooves 244 is denoted as P 1 , and the maximum depth of each of the elongated arcuate grooves 244 In the case of H 1 , R 1 , P 1 and H 1 satisfy the following relationship: 0.025 mm ≦ P 1 ≦ 1.5 mm, P 1 /4 ≦ R 1 ≦ 2P 1 , 0.01 mm ≦ H 1 ≦ R 1 . In this embodiment, the center-to-center spacing P 1 between two adjacent strip-shaped arcuate grooves 244 is 0.275 mm, and the radius R 1 of each strip-shaped arcuate groove 244 is 0.1375 mm, each strip-shaped arc The maximum depth H 1 of the groove 244 is 0.11 mm.
上述形成於出光面242之複數長條狀弧形凸起246相互平行。每一長條狀弧形凸起246之垂直方向之截面形狀為半圓形。將長條狀弧形凸起246之圓弧半徑記為R2，相鄰兩長條狀弧形凸起246之中心間距記為P2，每一長條狀弧形凸起246之最大深度記為H2，則R2、P2及H2滿足以下關係式：0.025mm≦P2≦1.5mm，P2/4≦R2≦2P2，0.01mm≦H2≦R2。本實施例中相鄰兩長條狀弧形凸起246間之中心間距P2為0.275mm，每一長條狀弧形凸起246之半徑R2為0.1375mm，每一長條狀弧形凸起246之最大深度H2為0.11mm。 The plurality of elongated arcuate projections 246 formed on the light exiting surface 242 are parallel to each other. The cross-sectional shape of each of the elongated arcuate projections 246 in the vertical direction is semicircular. The radius of the arc of the long arc-shaped protrusion 246 is denoted as R 2 , and the center-to-center spacing of the adjacent two elongated arc-shaped protrusions 246 is denoted as P 2 , and the maximum depth of each elongated arc-shaped protrusion 246 In the case of H 2 , R 2 , P 2 and H 2 satisfy the following relationship: 0.025 mm ≦ P 2 ≦ 1.5 mm, P 2 / 4 ≦ R 2 ≦ 2P 2 , 0.01 mm ≦ H 2 ≦ R 2 . In this embodiment, the center-to-center spacing P 2 between adjacent two elongated arc-shaped protrusions 246 is 0.275 mm, and the radius R 2 of each elongated arc-shaped protrusion 246 is 0.1375 mm, each elongated arc-shaped The maximum depth H 2 of the projections 246 is 0.11 mm.
第一光學板24之總體厚度可為0.4mm至3mm。第一光學板24可由聚甲基丙烯酸甲酯、聚碳酸酯、聚苯乙烯、苯乙烯-甲基丙烯酸甲酯共聚物中之一種或一種以上之材料注塑成型。製備過程中需於成型模具上設置與長條狀弧形凹槽244以及長條狀弧形凸起246相應之結構，以使第一光學板24經單次注塑成型。第一光學板24上之長條狀弧形凸起246及和第一光學板24之其他部分一體成型，可使長條狀弧形凸起246具有較高結構強度，同時還能提升長條 狀弧形凸起246其他部分之結合力，從而可避免或減少其使用時被損壞之危險。 The overall thickness of the first optical plate 24 may range from 0.4 mm to 3 mm. The first optical plate 24 may be injection molded from one or more of polymethyl methacrylate, polycarbonate, polystyrene, styrene-methyl methacrylate copolymer. During the preparation process, a structure corresponding to the elongated arcuate groove 244 and the elongated arcuate projection 246 is provided on the molding die to cause the first optical plate 24 to be subjected to single injection molding. The elongated arcuate projections 246 on the first optical plate 24 and the other portions of the first optical plate 24 are integrally formed, so that the elongated arcuate projections 246 have a high structural strength and can also be elongated. The bonding force of the other portions of the arcuate projections 246 avoids or reduces the risk of damage during use.
請參見圖3，第二光學板26由透明材料製成，其包括入光面261及與入光面261相對之出光面262，其中，入光面261為平面。第二光學板26於出光面262形成複數沿第一方向X1延伸之V形脊結構264a、複數沿第二方向X2延伸之V形脊結構264b、複數沿第三方向X3延伸之V形脊結構264c及複數沿第四方向X4延伸之V形脊結構264d。上述沿四個不同方向延伸之V形脊結構相互交錯。其中，沿第二方向X2延伸之V形脊結構264b與沿第四方向X4延伸之V形脊結構264d皆通過沿第一方向X1延伸之V形脊結構264a與沿第三方向X3延伸之V形脊結構264c間之交點。四個方向X1、X2、X3及X4中相鄰兩個方向間之夾角為45度，V形脊結構之頂角可為80度至100度，同方向上相鄰兩V形脊結構間之中心距離可為0.025毫米至1毫米。本實施例中，四個方向X1、X2、X3及X4相鄰V形脊結構間之中心距離分別D1、D2、D3與D4，D1=D3=D2= D4。上述沿四個方向X1、X2、X3及X4延伸之複數V形脊結構相互交錯形成複數相互連接之具有共同連接點之三棱錐凹槽264。具有共同連接點之三棱錐凹槽264相互連接之側壁形成四角星形266，且複數四角星形266呈矩形陣列排佈。此外，需要說明之是：藉由調整頂角之大小，可在一定程度上調整第二光學板26之增光率及出光視角。 Referring to FIG. 3, the second optical plate 26 is made of a transparent material, and includes a light incident surface 261 and a light exit surface 262 opposite to the light incident surface 261, wherein the light incident surface 261 is a flat surface. The second optical plate 26 forms a plurality of V-shaped ridge structures 264a extending in the first direction X 1 , a plurality of V-shaped ridge structures 264b extending in the second direction X 2 , and a plurality of V extending in the third direction X 3 on the light-emitting surface 262. shaped ridge structure 264c and a plurality of X V-shaped ridge structure 264d of 4 extending along the fourth direction. The above-described V-shaped ridge structures extending in four different directions are interlaced with each other. Wherein, the V-shaped ridge structure 264b extending in the second direction X 2 and the V-shaped ridge structure 264d extending in the fourth direction X 4 are both passed through the V-shaped ridge structure 264a extending along the first direction X 1 and along the third direction X 3 The intersection between the extended V-shaped ridge structures 264c. The angle between two adjacent directions in the four directions X 1 , X 2 , X 3 and X 4 is 45 degrees, the apex angle of the V-shaped ridge structure may be 80 degrees to 100 degrees, and two V-shaped ridges in the same direction The center distance between the structures can be from 0.025 mm to 1 mm. In this embodiment, the center distances between adjacent V-shaped ridge structures in the four directions X 1 , X 2 , X 3 and X 4 are respectively D 1 , D 2 , D 3 and D 4 , D 1 = D 3 = D 2 = D 4 . The plurality of V-shaped ridge structures extending in the four directions X 1 , X 2 , X 3 and X 4 are interlaced to form a plurality of triangular pyramid grooves 264 having mutually connected points. The side walls of the triangular pyramid grooves 264 having the common connection points are connected to each other to form a quadrangular star 266, and the plurality of square stars 266 are arranged in a rectangular array. In addition, it should be noted that the brightness enhancement and the viewing angle of the second optical plate 26 can be adjusted to some extent by adjusting the size of the apex angle.
第二光學板26之總體厚度T可為0.4毫米至4毫米。第二光學板26可由聚甲基丙烯酸甲酯、聚碳酸酯、聚苯乙烯、苯乙烯-甲基丙烯酸甲酯共聚物中之一種或一種以上之材料注塑成型。製備過程 中需於模具上設置與三棱錐凹槽264相應之凸起結構，以使第二光學板26經單次注塑成型。 The overall thickness T of the second optical plate 26 can be from 0.4 mm to 4 mm. The second optical plate 26 may be injection molded from one or more of polymethyl methacrylate, polycarbonate, polystyrene, styrene-methyl methacrylate copolymer. making process A convex structure corresponding to the triangular pyramid groove 264 is provided on the mold to allow the second optical plate 26 to be subjected to a single injection molding.
透明保護板27具有高透光性，其用於保護第二光學板26上之V形脊結構，避免V形脊結構受到外部灰塵等之污染或被其他物體刮傷。透明保護板27可由透明玻璃、透明塑膠板等製成。 The transparent protective plate 27 has high light transmittance for protecting the V-shaped ridge structure on the second optical plate 26, preventing the V-shaped ridge structure from being contaminated by external dust or the like or being scratched by other objects. The transparent protective plate 27 can be made of transparent glass, a transparent plastic plate or the like.
使用時，發光二極體22發出之光線經殼體21側壁212內表面之反射以及第一擴散空間23之擴散後進入第一光學板24，並於第一光學板24之入光面241及出光面242處發生特定之折射、反射與繞射等光學作用。其中，形成於第一光學板24入光面241之長條狀弧形凹槽244可收斂下方發光二極體22出射光之輻射角度，形成於第一光學板24出光面242之長條狀弧形凸起246可將光線於出光面242進行集光，從而光線從出光面242出射後形成均勻之線性光源。從第一光學板24出光面242出射之光線經第二擴散空間25之擴散後進入第二光學板26。於形成於第二光學板26出光面262之V形脊結構之作用下，光線發生特定之折射、反射與繞射等光學作用，每一光源向四週拓展形成分散之亮度相對較弱之複數虛擬光源，可改善發光二極體22上方之亮度並進行集光以提高正面亮度。光線從第二光學板26出射後形成均勻之面光源，其照射物體時可消除重影現象，提高照明品質。 In use, the light emitted by the LED 22 is reflected by the inner surface of the sidewall 212 of the housing 21 and diffused by the first diffusion space 23 into the first optical panel 24, and is incident on the light incident surface 241 of the first optical panel 24 and Optical effects such as specific refraction, reflection, and diffraction occur at the light exit surface 242. The long arcuate groove 244 formed on the light incident surface 241 of the first optical plate 24 can converge the radiation angle of the light emitted from the lower LED body 22, and is formed on the strip of the light emitting surface 242 of the first optical plate 24. The curved protrusion 246 collects the light on the light exit surface 242, so that the light emerges from the light exit surface 242 to form a uniform linear light source. The light emitted from the light exit surface 242 of the first optical plate 24 diffuses through the second diffusion space 25 and enters the second optical plate 26. Under the action of the V-shaped ridge structure formed on the light-emitting surface 262 of the second optical plate 26, the light undergoes specific optical effects such as refraction, reflection and diffraction, and each light source expands to the periphery to form a complex virtual light having a relatively weak dispersion. The light source can improve the brightness above the light-emitting diode 22 and collect light to increase the front brightness. The light is emitted from the second optical plate 26 to form a uniform surface light source, which can eliminate the ghost phenomenon and improve the illumination quality when the object is illuminated.
可以理解，上述照明裝置中，透明保護板27僅起到輔助之保護作用，其可以省略。形成於第一光學板24上之長條狀弧形凸起246與長條狀弧形凹槽244之垂直截面還可為橢圓弧形。同時，形成於第一光學板24入光面241之複數弧形凹槽244也可省略，從而入 光面241為平面，僅利用形成於第一光學板24出光面242之複數長條狀弧形凸起246之作用也可對光線進行拓展和均勻化。 It can be understood that in the above lighting device, the transparent protective plate 27 only serves as an auxiliary protection, which can be omitted. The vertical cross section of the elongated arcuate protrusion 246 and the elongated arcuate groove 244 formed on the first optical plate 24 may also be an elliptical arc. At the same time, the plurality of curved grooves 244 formed on the light incident surface 241 of the first optical plate 24 can also be omitted, thereby The smooth surface 241 is a flat surface, and the light can be expanded and homogenized only by the action of a plurality of long arc-shaped protrusions 246 formed on the light-emitting surface 242 of the first optical plate 24.
請參見圖4與圖5，本發明實施例二之第一光學板34由透明材料製成，其包括一入光面341和與入光面341相對之出光面342。其中，入光面341為平面，出光面342形成有複數交替排佈且相互平行之長條狀V型凸起346及長條狀弧形凸起348。長條狀弧形凸起348之垂直截面為半圓弧形。 Referring to FIG. 4 and FIG. 5, the first optical plate 34 of the second embodiment of the present invention is made of a transparent material, and includes a light incident surface 341 and a light exit surface 342 opposite to the light incident surface 341. The light-incident surface 341 is a flat surface, and the light-emitting surface 342 is formed with a plurality of strip-shaped V-shaped protrusions 346 and elongated arc-shaped protrusions 348 which are alternately arranged and parallel to each other. The vertical section of the elongated arcuate projection 348 has a semicircular arc shape.
將長條狀V型凸起346之寬度記為D，頂角記為θ，高度記為H1；則D、θ、H1滿足如下關係式：0.025毫米≦D≦1毫米，80度≦θ≦100度，0.01毫米≦H1≦3毫米。將長條狀弧形凸起348之寬度記為L，半徑記為R，高度記為H2，則L、R、H2滿足如下關係式：0.025毫米≦L≦1.5毫米，L/4≦R≦2L，0.01毫米≦H2≦R。藉由調節D、θ、H1、L、R、及H2之數值，可調整長條狀V型凸起346及長條狀弧形凸起348之形狀，從而調節第一光學板34之增光率及出光視角。 The width of the long V-shaped projection 346 is denoted by D, the apex angle is denoted by θ, and the height is denoted by H 1 ; then D, θ, H 1 satisfy the following relationship: 0.025 mm ≦ D ≦ 1 mm, 80 ≦ θ ≦ 100 degrees, 0.01 mm ≦ H 1 ≦ 3 mm. The width of the long arc-shaped protrusion 348 is denoted by L, the radius is denoted by R, and the height is denoted by H 2 , then L, R, H 2 satisfy the following relationship: 0.025 mm ≦ L ≦ 1.5 mm, L/4 ≦ R≦2L, 0.01 mm ≦H 2 ≦R. By adjusting the values of D, θ, H 1 , L, R, and H 2 , the shape of the elongated V-shaped protrusions 346 and the elongated arc-shaped protrusions 348 can be adjusted, thereby adjusting the first optical plate 34. Increasing rate and viewing angle.
與實施例一相同，可採用注塑成型方法製備上述第一光學板34，製備過程中需於模具上設置與長條狀V型凸起346和長條狀弧形凸起348相應之凹陷結構，以便使第一光學板34經單次注塑成型。 In the same manner as in the first embodiment, the first optical plate 34 can be prepared by an injection molding method, and a concave structure corresponding to the long V-shaped projection 346 and the elongated arc-shaped projection 348 is disposed on the mold during the preparation process. In order to subject the first optical plate 34 to a single injection molding.
可以理解，長條狀弧形凸起348之垂直截面也可為橢圓弧形。 It can be understood that the vertical section of the elongated arcuate protrusion 348 can also be an elliptical arc.
請參見圖6，本發明實施例三之第二光學板46與實施例一之第二光學板26相似，其由透明材料製成，包括入光面461及與該入光面461相對之出光面462，不同之處在於：該第二光學板46之出光 面462形成有由複數沿第一方向X1延伸之V形脊結構464a、複數沿第二方向X2延伸之V形脊結構464b以及複數沿第三方向X3延伸之V形脊結構464c。上述沿不同方向延伸之複數V形脊結構相互交錯。其中，沿第三方向X3延伸之V形脊結構464c通過沿第一方向X1延伸之V形脊結構464a與沿第二方向X2延伸之V形脊結構464b間之交點。第一方向X1與第二方向X2間之夾角為90度，第三方向X3與第一、第二方向X1、X2之夾角分別為45度和135度。三個方向X1、X2、X3之V形脊結構相互交錯形成相互連接之三棱錐形凹槽465與四棱錐形凹槽466，其中每一四棱錐凹槽466由相鄰四個三棱錐凹槽465所包圍。 Referring to FIG. 6 , the second optical plate 46 of the third embodiment of the present invention is similar to the second optical plate 26 of the first embodiment, and is made of a transparent material, and includes a light incident surface 461 and a light output opposite to the light incident surface 461 . The surface 462 is different in that the light-emitting surface 462 of the second optical plate 46 is formed with a V-shaped ridge structure 464a extending in the first direction X 1 and a plurality of V-shaped ridge structures 464b extending along the second direction X 2 . and X V-shaped ridge structure extending a plurality of 3 464c in the third direction. The plurality of V-shaped ridge structures extending in different directions are interlaced with each other. Wherein, the V-shaped ridge structure 464c extending in the third direction X 3 passes through the intersection between the V-shaped ridge structure 464a extending in the first direction X 1 and the V-shaped ridge structure 464b extending in the second direction X 2 . The angle between the first direction X 1 and the second direction X 2 is 90 degrees, and the angle between the third direction X 3 and the first and second directions X 1 , X 2 is 45 degrees and 135 degrees, respectively. The V-shaped ridge structures of the three directions X 1 , X 2 , and X 3 are interdigitated to form interconnected triangular pyramid grooves 465 and quadrangular pyramid grooves 466, wherein each quadrangular pyramid groove 466 is adjacent to four three Surrounded by pyramid grooves 465.
可以理解，第二光學板之出光面還可形成有沿兩個不同方向延伸之複數長條狀V型脊結構，該沿不同方向延伸之複數長條狀V型脊結構垂直相交。 It can be understood that the light-emitting surface of the second optical plate can also be formed with a plurality of elongated V-shaped ridge structures extending in two different directions, and the plurality of elongated V-shaped ridge structures extending in different directions intersect perpendicularly.
綜上所述，本發明確已符合發明專利之要件，遂依法提出專利申請。惟，以上所述者僅為本發明之較佳實施方式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案技藝之人士援依本發明之精神所作之等效修飾或變化，皆應涵蓋於以下申請專利範圍內。 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.
另外，本領域技術人員還可在本發明精神內做其他變化，當然，這些依據本發明精神所做之變化，都應包含在本發明所要求保護之範圍之內。 In addition, those skilled in the art can make other changes in the spirit of the present invention. Of course, the changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.
200‧‧‧照明裝置 200‧‧‧Lighting device
21‧‧‧殼體 21‧‧‧ housing
211‧‧‧基板 211‧‧‧Substrate
212‧‧‧側壁 212‧‧‧ side wall
22‧‧‧發光二極體 22‧‧‧Lighting diode
24‧‧‧第一光學板 24‧‧‧First optical board
26‧‧‧第二光學板 26‧‧‧Second optical plate
27‧‧‧透明保護板 27‧‧‧Transparent protection board
23‧‧‧第一擴散空間 23‧‧‧First diffusion space
25‧‧‧第二擴散空間 25‧‧‧Second diffusion space
Claims (20)
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| TW97139970A TWI407055B (en) | 2008-10-17 | 2008-10-17 | Illumination device |
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| TW97139970A TWI407055B (en) | 2008-10-17 | 2008-10-17 | Illumination device |
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| TW201017062A TW201017062A (en) | 2010-05-01 |
| TWI407055B true TWI407055B (en) | 2013-09-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI254176B (en) * | 1999-09-29 | 2006-05-01 | Sanyo Electric Co | Surface light source device |
| US20060120111A1 (en) * | 2004-12-02 | 2006-06-08 | Yasunori Onishi | Illumination device and light guide plate |
| JP2007335182A (en) * | 2006-06-14 | 2007-12-27 | Kuraray Co Ltd | Surface light source element, light control member used therefor, and image display device using surface light source |
| JP2008041546A (en) * | 2006-08-09 | 2008-02-21 | Showa Denko Kk | Light-emitting device, display device and cover attaching member |
| TW200834003A (en) * | 2006-09-08 | 2008-08-16 | Kuraray Co | Surface light source device and light control component for using the same, and image display using the surface light source device |
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2008
- 2008-10-17 TW TW97139970A patent/TWI407055B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI254176B (en) * | 1999-09-29 | 2006-05-01 | Sanyo Electric Co | Surface light source device |
| US20060120111A1 (en) * | 2004-12-02 | 2006-06-08 | Yasunori Onishi | Illumination device and light guide plate |
| JP2007335182A (en) * | 2006-06-14 | 2007-12-27 | Kuraray Co Ltd | Surface light source element, light control member used therefor, and image display device using surface light source |
| JP2008041546A (en) * | 2006-08-09 | 2008-02-21 | Showa Denko Kk | Light-emitting device, display device and cover attaching member |
| TW200834003A (en) * | 2006-09-08 | 2008-08-16 | Kuraray Co | Surface light source device and light control component for using the same, and image display using the surface light source device |
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